My samsung galaxy s3 has a loose USB port and fixing it will probably cost too much. Can anyone suggest a cheap 4G replacement? Does not need good specs. I need the price to be as low as possible as I have a tight budget.
I mainly use it for calls and some occasional web browsing/apps.
If you don't mind grey stock, then I would recommend the Xiaomi Mi A1. Comes at around $230-250 during sales. Currently $235 at Gearbest.
Another reputable seller is qd_au, it should be $251 in tomorrows 10% sitewide sale. It's probably more than what you're after in terms of specs, but as we don't know what your actual budget is, this seems to be the best value for money imo.
Have a read of the Budget Smartphones thread for further options.